I have two external monitors from my iMac, both are rotated in portrait mode. I assign apps to the outside displays via the dock so they open in a particular display.

When I open an App that is assigned to an external monitor, they will often open with their window either partially or completely outside of the display. The only way to 'grab' them is via spaces.

Does anyone have a solution for this issue?

  • How are the monitors connected? I've found anything other than Display Port is unreliable on rotated screens.
    – Tetsujin
    Feb 5, 2015 at 7:42

1 Answer 1


i have the same problem, i noticed that it happen if i start or resume my mac with the external display connected, if i connect it after the mac is wake up it behave normally.

Probably it fail to detect the correct setting for monitor during startup (or something messed it up as wake up)

So not a fix but at least you can work..

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